我的应用程序在我正在开发的 iMac 上运行良好。但是,我在 Heroku 上收到以下错误(这是 Heroku 日志):
ActionView::Template::Error (undefined method `name' for nil:NilClass):
22: <% end %>
23: <td><%= workorder.description %></td>
24: <% if workorder.location_id != nil %>
25: <td><%= workorder.location.name %></td>
app/views/home/_myopenorders.html.erb:25:in `block in _app_views_home__myopenorders_html_erb__1134835514768073858_64792180'
app/views/home/index.html.erb:66:in `_app_views_home_index_html_erb___3327722386939287121_60092520'
26: <% else %>
27: <td></td>
app/views/home/_myopenorders.html.erb:15:in `_app_views_home__myopenorders_html_erb__1134835514768073858_64792180'
28: <% end %>
这是代码:
<% if workorder.location_id != nil %>
<td><%= workorder.location.name %></td>
<% else %>
<td></td>
<% end %>
有任何想法吗?
更新:
有时日志看起来像 Heroku 正在乱序运行 ruby 代码。看这个:
ActionView::Template::Error (undefined method `name' for nil:NilClass):
22: <% end %>
26: <% else %>
app/views/home/index.html.erb:66:in `_app_views_home_index_html_erb__2268065945584360823_49285320'
app/views/home/_myopenorders.html.erb:25:in `block in _app_views_home__myopenorders_html_erb___3485426105947531181_51160960'
27: <td></td>
app/views/home/_myopenorders.html.erb:15:in `_app_views_home__myopenorders_html_erb___3485426105947531181_51160960'
28: <% end %>
24: <% if workorder.location_id != nil %>